package com.itheima.reggie.config;
import com.itheima.reggie.common.JacksonObjectMapper;
import lombok.extern.slf4j.Slf4j;
import org.springframework.context.annotation.Configuration;
import org.springframework.http.converter.HttpMessageConverter;
import org.springframework.http.converter.json.MappingJackson2HttpMessageConverter;
import org.springframework.web.servlet.config.annotation.ResourceHandlerRegistry;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurationSupport;
import java.util.List;
@Configuration//表示这是一个配置类
@Slf4j//打印日志
public class WebMvcConfig extends WebMvcConfigurationSupport {
    /**
     * 设置静态资源映射
     * @param registry
     */
    @Override
    protected void addResourceHandlers(ResourceHandlerRegistry registry) {
        log.info("开始启动静态资源映射");
        //pathPatterns浏览器输入的路径
        //ResourceLocations静态资源存放服务器的地址
      registry.addResourceHandler("/backend/**").addResourceLocations("classpath:/backend/");
      registry.addResourceHandler("/front/**").addResourceLocations("classpath:/front/");
    }

    @Override
    protected void extendMessageConverters(List<HttpMessageConverter<?>> converters){
         //创建消息转换器
        MappingJackson2HttpMessageConverter messageConverter =new MappingJackson2HttpMessageConverter();
         //设置具体的对象映射器
        messageConverter.setObjectMapper(new JacksonObjectMapper());
         //通过设置索引,让自己的转换器放在最前面,否则默认的jakson转换器会在前面,用不上我们设置的转换器
        converters.add(0,messageConverter);
    }
}
